Al-Kāfi - The Book of Prayer

Chapter: Performing Optional Salah (Prayer) at the Time of Obligatory Salah (Prayer) and the Times Not to Perform Salah (Prayer) َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ يُونُسَ بْنِ يَعْقُوبَ عَنْ ٠ِنْهَالٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلا٠) عَنِ الْوَقْتِ الَّذِي لاَ يَنْبَغِي لِي [أَنْ يَتَنَفَّلَ‏] إِذَا جَاءَ الزَّوَالُ قَالَ ذِرَاعٌ إِلَى ٠2.

Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Faddal Yunus ibn Ya‘qub from Minhal who has said the following: “I once asked abu ‘Abd Allah (a.s.), about the time when I should not perform any optional Salah (prayer) after the sun declines toward the west at noontime. He (the Imam) replied, ‘When it is one yard until it is like it (twice as much).”’ جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/54))